Speaker
Description
The type-II see-saw mechanism based on the annexation of the Standard Model by weak gauge triplet of scalar field proffers a natural explanation for the very minuteness of neutrino masses. Noting that the phenomenology for the degenerate triplet Higgs spectrum is substantially contrasting than that for the non-degenerate one, we perform a comprehensive study for a wide range of the model parameter space parametrised by triplet Higgs vacuum expectation value ($v_t$), the mass-splitting between the doubly and singly charged Higgs (∆m) and the doubly charged Higgs mass ($m_{H^{±±}}$). Considering all the Drell-Yan production mechanisms, some of which are often forsaken by both CMS and ATLAS, we derive the most stringent 95% CL lower limit on the doubly charged Higgs mass for a wide range of $v_t$ and ∆m by implementing already existing direct collider searches by CMS and ATLAS. Further, we propose a search strategy that yields improved limits for a significant part of the parameter space of $v_t$ and ∆m.
